Statistics homework help

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Attached are the questions that need to be done..
  • attachment

    91comparingtwopopulations.pdf
  • attachment

    101hypothesistesting.pdf

Mathematics homework help

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Project #2, MTH – 154 Quantitative Reasoning
Create a Sales Report and make Analysis of your Expenses during one-two month time period
Goals:
Create, Save, and Navigate an Excel Workbook
Enter Data in a Worksheet
Construct and Copy Formulas and Use the Functions; Construct Formulas for Mathematical Operations
Format Cells with Merge & Center, Cell Styles, and Themes
Chart Data to Create different Column Charts
Format all tables as ready for Print Worksheet, Display Formulas
Instructions
Create the table in Excel with original data; create a title for this table.
List for Groceries category at least 10 positions; for Entertainment 2-5, for Other 3 positions (for example, rent, books, gas, etc.). You have to create a bigger table than below.
Calculate the tax in formulas for each category. Sales Tax Rates are different for states and counties. Find the Tax Rates in your county: https://tax.virginia.gov/retail-sales-and-use-tax . Indicate in the conclusion what Sale Tax you applied.
Create a Bar Chart for Groceries Expenses. Title your chart.
Create a Pie Chart for main categories: Groceries, Entertainment and Other. Show in this chart Percentage of Total Expenses. Title your chart.
Write 3-5 sentences in conclusion: what is proportion of your expenses for the different positions, how you can manage it, etc. Your conclusion must have quantitative reasonings.
In the second row of worksheet, write your full name and class.
Format page in Excel, use landscape orientation. Pay attention to charts: they have to be visible as a whole piece.
Safe the file with your full name, Upload the file in Canvas -> Assignments. The Extension of file must be xls or xlsx.

Mathematics homework help

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Mathematics homework help
math
QUESTION 1
The probability distribution of a random variable X is
x–2–1012P ( X = x )
Compute the mean, variance, and standard deviation of X.
a.
b.
c.
d.
1 points
QUESTION 2
A probability distribution has a mean of 57 and a standard deviation of 1.4. Use Chebychev’s inequality to find the value of c that guarantees the probability is at least 96% that an outcome of the experiment lies between 57 – c and 57 – c. (Round the answer to nearest whole number.)
a.3
b.9
c.1
d.7
e.5
1 points
QUESTION 3
Find the variance of the probability distribution for the histogram:
a.Var ( X) = 4.2625
b.Var ( X) = 4.65
c.Var ( X) = 4.28
d.Var ( X) = 4.0125
1 points
QUESTION 4
The birthrates in the country for the years 1981-1990 are:
Year1981198219831984198519861987198819891990Birthrate15.915.515.515.715.715.615.715.916.216.7
(The birthrate is the number of live births/1,000 population.)
Compute the mean, variance, and standard deviation of the random variable X.
a.
b.
c.
d.
1 points
QUESTION 5
Rosa Walters is considering investing $10,000 in two mutual funds. The anticipated returns from price appreciation and dividends (in hundreds of dollars) are described by the following probability distributions:
Mutual Fund A
ReturnsProbability-40.280.3100.5
Mutual Fund B
ReturnsProbability-20.260.680.2
Compute (in dollars) the mean and variance for each mutual fund.
a. Mutual Fund A:
Mutual Fund B:
b. Mutual Fund A:
Mutual Fund B:
c. Mutual Fund A:
Mutual Fund B:
d. Mutual Fund A: Mutual Fund B:
1 points
QUESTION 6
The number of Americans without health insurance, in millions, from 1995 through 2002 is summarized in the following table.
Year19951996199719981999200020012002Americans40.541.443.644.740.239.241.143
What is the standard deviation of Americans without health insurance in the period from 1995 through 2002?
a. million
b. million
c. million
d. million
e. million
1 points
QUESTION 7
The mean annual starting salary of a new graduate in a certain profession is $43,000 with a standard deviation of $500. What is the probability that the starting salary of a new graduate in this profession will be between $39,500 and $46,500?
a.At least
b.At least
c.At least
d.At least
1 points
QUESTION 8
A survey was conducted by the market research department of the National Real Estate Company among 500 prospective buyers in a large metropolitan area to determine the maximum price a prospective buyer would be willing to pay for a house. From the data collected, the distribution that follows was obtained.
Compute the standard deviation of the maximum price (in thousands of dollars) that these buyers were willing to pay for a house. Round the answer to the nearest integer.
Maximum Price Considered, 150160170180190220250270320
a.
b.
c.
d.
e.
1 points
QUESTION 9
The following table gives the scores of 30 students in a mathematics examination.
Scores90-9980-8970-7960-6950-59Students381351
Find the mean and the standard deviation of the distribution of the given data. Hint: Assume that all scores lying within a group interval take the midvalue of that group.
a.
b.
c.
d.
e.
1 points
QUESTION 10
A probability distribution has a mean of 45 and a standard deviation of 1. Use Chebychev’s inequality to estimate the probability that an outcome of the experiment lies between 43 and 47.
a.At least 0.8
b.At least 0.75
c.At least 0.5
d.At least 0.25
e.At least 0.04
Two
 
QUESTION 1
Find the value of the probability of the standard normal variable Z corresponding to the shaded area under the standard normal curve.
P ( – 1.36 < Z < 1.75 )
a.P (- 1.36 < Z < 1.75 ) = 0.0869
b.P (- 1.36 < Z < 1.75 ) = 0.8730
c.P (- 1.36 < Z < 1.75 ) = 0.9599
d.P (- 1.36 < Z < 1.75 ) = 1.0468
1 points
QUESTION 2
Suppose X is a normal random variable with and . Find the value of .
a.0.9050
b.0.8996
c.0.8945
d.0.8818
e.0.9857
1 points
QUESTION 3
Find the value of the probability of the standard normal variable Z corresponding to this area.
P ( Z > 2.31 )
a.P ( Z > 2.31 ) = 0.0084
b.P ( Z > 2.31 ) = 0.0104
c.P ( Z > 2.31 ) = 0.0136
d.P ( Z > 2.31 ) = 0.9896
1 points
QUESTION 4
Suppose X is a normal random variable with and . Find the value of .
a.0.498
b.0.726
c.0.495
d.0.4333e.0.72
1 points
QUESTION 5
Find the value of the probability of the standard normal variable Z corresponding to the shaded area under the standard normal curve.
P ( 0.3 < Z < 1.85 )
a.P (0.3 < Z < 1.85 ) = 0.3499
b.P (0.3 < Z < 1.85 ) = 1.5857
c.P (0.3 < Z < 1.85 ) = 0.9678
d.P (0.3 < Z < 1.85 ) = 0.6179
Three
QUESTION 1
According to data released by the Chamber of Commerce of a certain city, the weekly wages (in dollars) of female factory workers are normally distributed with a mean of 575 and a standard deviation of 50. Find the probability that a female factory worker selected at random from the city makes a weekly wage of $550 to $625.
​a.The probability is 0.5438.
b.The probability is 0.5328.
c.The probability is 0.4297.
d.The probability is 0.5339.
1 points
QUESTION 2
To be eligible for further consideration, applicants for certain Civil Service positions must first pass a written qualifying examination on which a score of 70 or more must be obtained. In a recent examination it was found that the scores were normally distributed with a mean of 67 points and a standard deviation of 6 points. Determine the percentage of applicants who passed the written qualifying examination.​
a.18.79% applicants passed the written qualifying examination.
b.19.52% applicants passed the written qualifying examination.
c.30.85% applicants passed the written qualifying examination.
d.24.74% applicants passed the written qualifying examination.
1 points
QUESTION 3
Use the appropriate normal distribution to approximate the resulting binomial distribution.
The manager of Madison Finance Company has estimated that, because of a recession year, 5% of its 400 loan accounts will be delinquent. If the manager’s estimate is correct, what is the probability that 11 or more of the accounts will be delinquent?
a.The probability is 0.9994.
b.The probability is 0.9891.
c.The probability is 0.8137.
d.The probability is 0.9854.
1 points
QUESTION 4
Use the appropriate normal distribution to approximate the resulting binomial distribution.
A basketball player has a 75% chance of making a free throw. What is the probability of her making 80 or more free throws in 120 trials?
a.The probability is 0.9744.
b.The probability is 0.9822.
c.The probability is 0.9864.
d.The probability is 0.9898.
1 points
QUESTION 5
Use the appropriate normal distribution to approximate the resulting binomial distribution.
Colorado Mining and Mineral has 800 employees engaged in its mining operations. It has been estimated that the probability of a worker meeting with an accident during a 1-year period is .1. What is the probability that more than 80 workers will meet with an accident during the 1-year period?
a.The probability is 0.4684.
b.The probability is 0.4669.
c.The probability is 0.8491.
d.The probability is 0.4761.

Mathematics homework help

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Mathematics homework help
FINAL
math
Expert
QUESTION 1
Suppose a probability distribution of a random variable X is represented by the accompanying histogram. Shade that part of the histogram whose area gives the probability .​
​a.​
b.
c.
d.
e.
1 points
QUESTION 2
Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a blood specimen is typed, the presence of the A and/or B antigen is indicated by listing the letter A and/or the letter B. If neither the A nor B antigen is present, the letter O is used. The presence or absence of the Rh antigen is indicated by the symbols + or -, respectively. Thus, if a blood specimen is classified as AB +, it contains the A and the B antigens as well as the Rh antigen. Similarly, O- blood contains none of the three antigens.
Using this information, determine the sample space corresponding to the different blood groups.
a.{ A+, B+, A-, B-, O+, O-}
b.{ AB+, AB-, A+, B+, A-, B-, O+, O-, ABO-, AO+, AO-, BO+, BO-}
c.{ AB+, AB-, AO+, BO+, AO-, BO-, O+, O-}
d.{ AB+, AB-, O+, O-}e.{ AB+, AB-, A+, B+, A-, B-, O+, O-}
1 points
QUESTION 3
A card is drawn from a well-shuffled deck of 36 playing cards. Let E denote the event that the card drawn is red and let F denote the event that the card drawn is a hearts. Determine whether E and F are dependent events.
a.dependent
b.independent
1 points
QUESTION 4
Determine whether the table gives the probability distribution of the random variable X. Explain your answer.
xP(X = x)
a.Yes, the sum of the probability assigned to the value of the random variable X is equal to 1.
b.No, the probability assigned to a value of the random variable X cannot be negative.
c.No, the sum of the probability assigned to the value of the random variable X is greater than 1.
d.No, the sum of the probability assigned to the value of the random variable X is less than 1.
e.No, the sum of the probability assigned to the value of the random variable X is not equal to 1.
1 points
QUESTION 5
A certain airport hotel operates a shuttle bus service between the hotel and the airport. The maximum capacity of a bus is 20 passengers. On alternate trips of the shuttle bus over a period of 1 wk, the hotel manager kept a record of the number of passengers arriving at the hotel in each bus.
Describe the event E that a shuttle bus carried fewer than twelve passengers.
a.{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
b.{0, 1, 2, 3, 4, 5, 6, 7}
c.{0, 1, 2, 3, 4, 5, 6, 7, 8}
d.{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}
1 points
QUESTION 6
Find the expected value of a random variable X having the following probability distribution:
x-5-10158P(X = x)0.110.170.280.230.110.1
a.E( X) = 0.73
b.E( X) = 0.86
c.E( X) = 0.79
d.E( X) = 1.07
1 points
QUESTION 7
The sample space associated with an experiment is given by . The events and are mutually exclusive. Hence, the events Ec and F c are mutually exclusive.
​a.The statement is incorrect
b.The statement is correct
1 points
QUESTION 8
The scores on an Economics examination are normally distributed with a mean of 74 and a standard deviation of 11. If the instructor assigns a grade of A to 10% of the class, what is the lowest score (rounded to the nearest integer) a student may have and still obtain an A?
a.71
b.80
c.82
d.89
e.86
1 points
QUESTION 9
An experiment consists of tossing a coin, rolling a die, and observing the outcomes. Describe an appropriate sample space for this experiment.
a.{( H, 1), ( T, 2), ( H, 3), ( T, 4), ( H, 5), ( T, 6), ( T, 1), ( T, 4), ( T, 5), ( H, 6)}
b.{( H, 1), ( H, 2), ( H, 3), ( H, 4), ( H, 5), ( H, 6), ( T, 1), ( T, 2), ( T, 3), ( T, 4), ( T, 5), ( T, 6)}
c.{(1, 2, 3, 4, 5, 6), ( H, T)}
d.{( H, H, H, H, H, H, T, T, T, T, T, T, 1, 2, 3, 4, 5, 6)}
e.{(1, H, T), (2, H, T), (3, H, T), (4, H, T), (5, H, T), (6, H, T)}
1 points
QUESTION 10
In a lottery, 4,000 tickets are sold for $1 each. One first prize of $2,000, 1 second prize of $800, 3 third prizes of $120, and 10 consolation prizes of $12 are to be awarded. What are the expected net earnings of a person who buys one ticket?
a. cents
b. cents
c. cents
d. cents
e. cents
1 points
QUESTION 11
Let Z be the standard normal variable. Find the value of z if z satisfies .​
a.
b.
c.
d.
e.
1 points
QUESTION 12
In ”The Numbers Game,” a state lottery, four numbers are drawn with replacement from an urn containing the digits 0-9, inclusive. Find the probability of a ticket holder having the indicated winning ticket.​
All four digits in any order(including the other winning tickets)
​
a.0.0024
b.0.0017
c.0.0004
d.1
e.0.0002f.0
1 points
QUESTION 13
Suppose X is a normal random variable with and . Find the value of .
a.0.8996
b.0.8945
c.0.8818
d.0.9857
e.0.9050
1 points
QUESTION 14
The grade distribution for a certain class is shown in the table. Find the probability distribution associated with these data.
GradeABCDFFrequency of Occurrence482062
​a.​GradeABCDFFrequency of0.1 0.21 0.480.160.05 Occurrence
​b.GradeABCDFFrequency of0.110.2 0.430.15 0.11Occurrence
​c.​GradeABCDFFrequency of0.10.15 0.450.2 0.1Occurrence
​d.GradeABCDFFrequency of0.1 0.2 0.5 0.15 0.05Occurrence ​
1 points
QUESTION 15
One of the key determinants of economic growth is access to capital. Using 54 variables to create an index of 1-7, with 7 been best possible access to capital, Milken Institue ranked the following as the top ten nations (although technically Hong Kong is not a nation) by the ability of their entrepreneurs to gain access to capital:
CountryHong KongNetherlandU.K.SingaporeSwitzerlandU.S.AustraliaFinlandGermanyDenmarkIndex5.595.075.045.475.235.395.925.015.275.43
Find the mean of the indices of the top ten nations. What is the standard deviation of these data?
a.μ = 3.32; σ = 0.43
b.μ = 5.94; σ = 0.27
c.μ = 5.34; σ = 0.58
d.μ = 5.34; σ = 0.28
e.μ = 3.25; σ = 0.28
1 points
QUESTION 16
Let S = {1, 2, 3, 4, 5, 6}, E = {1, 3, 5}, F = {2, 4, 6} and G = {2, 3} .
Find the event E ∪ F ∪ G.
a.E ∪ F ∪ G = {2, 3, 4, 5, 7}
b.E ∪ F ∪ G = {1, 2, 3, 4, 5, 6}
c.E ∪ F ∪ G = {1, 3, 4, 5, 6}
d.E ∪ F ∪ G = {1, 2, 3, 5, 6}
1 points
QUESTION 17
The following table gives the number of people killed in rollover crashes in various types of vehicles in 2002:
Types of VehiclesCarsPickupsSUVsVansDeaths472026602195684
If a fatality due to a rollover crash in 2002 is picked at random, what is the probability that the victim was in a pickup or an SUV?
a.0.55
b.0.47
c.0.37
d.0.52
e.0.40
1 points
QUESTION 18
Give the range of values that the random variable X may assume and classify the random variable as finite discrete, infinite discrete, or continuous.​
X = The number of defective watches in a sample of four watches.
​
a.X may assume the values of any positive integer. The random variable is continuous.
b.{0,1,2,3,4,5,6,7,8,9}; The random variable is infinite discrete
c.X may assume the values of any positive integer. The random variable is infinite discrete.
d.{0,1,2,3,4,5,6,7,8,9}; The random variable is finite discrete
1 points

Mathematics homework help

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Mathematics homework help
math
Expert
QUESTION 1
Find the simple interest on a $500 investment made for 2 years at an interest rate of 7%/year. What is the accumulated amount?​
a.The simple interest is $70,the accumulated amount is $570.
b.The simple interest is $90,the accumulated amount is $590.
c.The simple interest is $45,the accumulated amount is $545.
d.The simple interest is $55,the accumulated amount is $585.
1 points
QUESTION 2
Find the slope of the line that passes through the pair of points.
and
a.b.c.d.e.
1 points
QUESTION 3
In how many different ways can a panel of 12 jurors and 2 alternate jurors be chosen from a group of 27 prospective jurors?​a.1,825,304,100
b.1,825,304,800
c.1,825,305,300
d.1,825,305,500
e.1,825,305,200
1 points
QUESTION 4
Consider the supply equation , where x is the quantity supplied in units of 1,000 and p is the unit price in dollars. Determine the number of units of the commodity the supplier will make available in the market at the given unit price .
a.4,300
b.4,000
c.3,400
d.3,100
e.3,700
1 points
QUESTION 5
If Jackson deposited $800 at the end of each month in the saving account earing interest at the rate of 3%/year compounded monthly, how much will he have on deposite in his savings account at the end of 3 years, assuming that he makes no withdrawals during that period? Round your answers to two decimal places.
​a.$30,023.08
b.$30,096.45
c.$30,074.52
d.$29,996.22
e.$30,071.45
1 points
QUESTION 6
Entomologists have discovered that a linear relationship exists between the number of chirps of crickets of a certain species and the air temperature. When the temperature is , the crickets chirp at the rate of , and when the temperature is , they chirp at the rate of . Find N as a function of T and use this formula to determine the rate at which the crickets chirp when the temperature is .
a.
b.
c.
d.
1 points
QUESTION 7
The demand equation for a certain brand of fax machine is 3 x + p – 1,400 = 0, where x is the quantity demanded per week and p is the unit price in dollars.
The supply equation is 2 x – 3 p + 900 = 0, where x is the quantity the supplier will make available in the market when the unit price is p dollars. Find the equilibrium quantity and the equilibrium price for the fax machines.
a.equilibrium quantity 190 units; equilibrium price $500
b.equilibrium quantity 300 units; equilibrium price $650
c.equilibrium quantity 190 units; equilibrium price $650
d.equilibrium quantity 300 units; equilibrium price $500
1 points
QUESTION 8
Find an equation of the circle that satisfies the given conditions.
Radius 9 and center ( 1, 8)
a.
b.
c.
d.
e.
1 points
QUESTION 9
Find the smallest possible set (that is, the set with the least number of elements) that contains the given sets as subsets.​
​a.
b.
c.
d.
1 points
QUESTION 10
To gain access to his account, a customer using an automatic machine (ATM) must enter a six-digit code. If repetition of same six digit is not allowed (for example, 555555), how many possible combinations are there?
a.59,039
b.999,990
c.99,990
d.1,200e.720
1 points
QUESTION 11
Find the accumulated amount A if the principal, P = $ is invested at the interest rate r = %/year for t = years compounded semiannually. Round your answers to two decimal places.
​a.The accumulated amount is $ .
b.The accumulated amount is $ .
c.The accumulated amount is $ .
d.The accumulated amount is $ .
e.The accumulated amount is $ .
1 points
QUESTION 12
Let and . Find the set .​a.b.c.d.
1 points
QUESTION 13
Find an equation of the vertical line that passes through .
a.
b.
c.
d.
1 points
QUESTION 14
Determine whether the lines through the given pairs of points are parallel.
A (2, – 2), B (- 3, – 17) and C (1, 3), D (- 1, 6)
a.The lines through the given pairs of points are .
b.The lines through the given pairs of points are .
1 points
QUESTION 15
Sketch a set of coordinate axes and plot the given point.
(7, -10)
a.
b.
c.
d.
e.
1 points
QUESTION 16
Refer to the accompanying figure and find the points that belong to the set.​
​
​a.r
b.s, t
c.x, y
d.v
e.
1 points
QUESTION 17
Metro Department Store’s annual sales (in millions of dollars) during 5 years were
Annual Sales, y5.86.27.28.59Year, x12345Plot the annual sales (y) versus the year (x) and draw a straight line L through the points corresponding to the first and fifth years and derive an equation of the line L.
a.
​b.
​
c.
​
1 points
QUESTION 18
Determine whether the equation defines y as a linear function of x. If so, write it in the form
y = mx + b .
2 x + 3 y = 18
a.
b.
c.
d.y is not a linear function of x.
1 points
QUESTION 19
Sketch a set of coordinate axes and plot the given point.
a.
b.c.d.
1 points
QUESTION 20
Shade the portion of the accompanying figure that represents the set.​
​a.b.c.d.e.
1 points
QUESTION 21
Determine whether the statement is true or false.​
Susan’s salary increased from $65,000/year to $75,000/year over a 6-year period. Therefore, Susan got annual increases of 6% over that period.
​a.True. This follows from formula A = P(1 + rt).
b.False. If Susan had gotten annual increases of 6 percent over 6 years, her salary would have been , or approximately $92,203.74 after 6 years, not $75,000.​
1 points
QUESTION 22
Refer to the accompanying figure and determine the coordinates of the given point and the quadrant in which it is located.
a.(3, 7); Quadrant I
b.(- 3, – 7); Quadrant IV
c.(- 3, 7); Quadrant II
d.(- 3, – 7); Quadrant III
1 points
QUESTION 23
How many different batting orders can be formed for a five-member baseball team?​
a.
b.
c.
d.
1 points
QUESTION 24
Mitchell has been given the option of either paying his $100 bill now or settling it for $105 after 2 mo. If he chooses to pay after 2 mo, find the simple interest rate at which he would be charged.
a.The simple interest rate is 0.31%/year.
b.The simple interest rate is 30%/year.
c.The simple interest rate is 31%/year.
d.The simple interest rate is 5%/year.
1 points
QUESTION 25
Lauren plans to deposit $8,000 into a bank account at the beginning of next month and $200/month into the same account at the end of that month and at the end of each subsequent month for the next 5 yr. If her bank pays interest at the rate of 6%/year compounded monthly, how much will Lauren have in her account at the end of the 5 yr? (Assume she makes no withdrawals during the 5-yr period.) Please round the answer to the nearest cent.​
a.$24,071.38
b.$10,598.26
c.$30,173.98
d.$33,702.71
e.$24,744.81
1 points
QUESTION 26
In a survey of members of a local sports club, members indicated that they plan to attend the next Summer Olympic Games, indicated that they plan to attend the next Winter Olympic Games, and indicated that they plan to attend both games. How many members of the club plan to attend at least one of the two game?​
a.
b.
c.
d.
e.
1 points
QUESTION 27
Sketch a set of coordinate axes and plot the given point.
(4, 2)
a.b.c.d.
1 points
QUESTION 28
A quorum (minimum) of 3 voting members is required at all meetings of some association. If there is a total of 9 voting members in the group, find the number of ways this quorum can be formed.​
a.72
b.77
c.84
d.69
e.81
1 points
QUESTION 29
Data released by the Department of Education regarding the rate (percentage) of ninth-grade students that don’t graduate showed that out of 50 states,​
11 states had an increase in the dropout rate during the past 2 years.
​
13 states had a dropout rate of at least 30% during the past 2 years.
​
21 states had an increase in the dropout rate and/or a dropout rate of at least 30% during the past 2 years.
​
How many states had a dropout rate that was less than 30% but that had increased over the 2-year period?
​a.14
b.3
c.16
d.8
e.10
1 points
QUESTION 30
In how many ways can a member of a hiring committee select 7 of 14 job applicants for further consideration?​
a.
b.
c.
d.
1 points
QUESTION 31
Sketch a set of coordinate axes and plot the given point.
(1.5, -1.5)
a.b.c.d.
1 points
QUESTION 32
Use venn daigram to illustrate the statement.
​a.​b.c.​d.e.​
1 points
QUESTION 33
Refer to the following diagram where U is the set of all tourists surveyed over a 1-week period in London and​
​
​
​
Express regions 2, 5, 6, and 8 together in set notation and in words.
​
a.; The set of tourists who have not taken a cab over a 1-wk period in London.
b.; The set of tourists who have not taken the underground over a 1-wk period in London
c.; The set of tourists who have not taken a bus over a 1-wk period in London
d.; The set of tourists who have not taken a cab over a 1-wk period in London
e.; The set of tourists who have not taken the underground over a 1-wk period in London.
1 points
QUESTION 34
Evaluate the expression.​
​a.b.c.d.
1 points
QUESTION 35
A country is not building many nuclear plants, but the ones it has are running at nearly full capacity. The output (as a percent of total capacity) of nuclear plants is described by the equation
 
where t is measured in years, with corresponding to the beginning of 1990.
If the utilization of nuclear power continues to grow at the same rate and the total capacity of nuclear plants in the country remains constant, by what year can the plants be expected to be generating at maximum capacity?
a.2002
b.2015
c.2004
d.2005
e.2001
1 points
QUESTION 36
A server purchased at a cost of $80,000 in 2002 has a scrap value of $16,000 at the end of 4 years. Find the linear equation expressing the server’s book value at the end of t years.
a.
b.
c.
d.
e.
1 points
QUESTION 37
How many days will it take for a sum of $9,000 to earn $90 interest if it is deposited in a bank paying ordinary simple interest at the rate of 5%/year? (Use a 365-day year.)
​a.It will take 73 days for a sum of $9,000 to earn $90.
b.It will take 438 days for a sum of $9,000 to earn $90.
c.It will take 123 days for a sum of $9,000 to earn $90.
d.It will take 53 days for a sum of $9,000 to earn $90.
1 points
QUESTION 38
Sketch a set of coordinate axes and plot the given point.
(5, 5)
a.b.c.d.
1 points
QUESTION 39
Let and be two nonvertical straight lines in the plane with equations and , respectively. Find conditions on , , and so that and intersect at infinitely many points.
a. and
b.
c.
d. and
1 points
QUESTION 40
List the elements of the given set in roster notation.​
​a.
b.
c.
d.

Trigonometry homework help

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i need help with my trigonometry homework, its very simple there are videos to explain what to do and multiple chances to correctly type in the answer. its time consuming and i don’t have time in my schedule to complete it. i work 2 jobs and i need to get it done by the weekend

Trigonometry homework help

/in /by

i need help with my trigonometry homework, its very simple there are videos to explain what to do and multiple chances to correctly type in the answer. its time consuming and i don’t have time in my schedule to complete it. i work 2 jobs and i need to get it done by the weekend

Mathematics homework help

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Answer all questions. Show all calculations. Explain clearly and completely.
1.  A statewide poll for an upcoming gubernatorial election concluded that 52.8% of the voters will vote for candidate A and 47.1% will vote for candidate B. The margin of error is ±2.5%. The confidence level for this result is 95%.
1a. Explain the Confidence Interval.  (3 pts.)
1b. Explain the difference between the Confidence Interval and the Confidence Level.  (5 pts.)
1c.  Explain what happens to the Confidence Level when the Confidence Interval is increased (widened).  (4 pts.)
1d.  Is the poll result predicting a win for either candidate (A or B)? Explain.  (5 pts.)
1e.  Explain at least two reasons that could cause these poll results to be inaccurate,biased or unreliable.  (8 pts.)
2.  A university president claims that on average, at least 60% of incoming freshman students go on to earn their degrees and graduate from the university.
For the hypothesis test, a random sample of 50 freshman students were selected for a sample study. 27 of them graduated with their degrees. 27 out of 50 is 54%.
The test statistic (formula result) is z = -1.46.
The p-value for this test statistic is .0721 or 7.21%.
2a. Explain is the parameter of interest?  (3 pts)
2b.  Explain the Null Hypothesis.  (4 pts.)
2c.  Explain the Alternative Hypothesis.  (4 pts.)
2d.  Based on the test statistic, z, and the p-value, explain whether we should accept or reject the Null hypothesis.  (6 pts.)
2e.  Explain in your own words what the conclusion in 2d says about the result of the test and the action to be taken. (8 pts)

Mathematics homework help

/in /by
Answer all questions. Show all calculations. Explain clearly and completely.
1.  A statewide poll for an upcoming gubernatorial election concluded that 52.8% of the voters will vote for candidate A and 47.1% will vote for candidate B. The margin of error is ±2.5%. The confidence level for this result is 95%.
1a. Explain the Confidence Interval.  (3 pts.)
1b. Explain the difference between the Confidence Interval and the Confidence Level.  (5 pts.)
1c.  Explain what happens to the Confidence Level when the Confidence Interval is increased (widened).  (4 pts.)
1d.  Is the poll result predicting a win for either candidate (A or B)? Explain.  (5 pts.)
1e.  Explain at least two reasons that could cause these poll results to be inaccurate,biased or unreliable.  (8 pts.)
2.  A university president claims that on average, at least 60% of incoming freshman students go on to earn their degrees and graduate from the university.
For the hypothesis test, a random sample of 50 freshman students were selected for a sample study. 27 of them graduated with their degrees. 27 out of 50 is 54%.
The test statistic (formula result) is z = -1.46.
The p-value for this test statistic is .0721 or 7.21%.
2a. Explain is the parameter of interest?  (3 pts)
2b.  Explain the Null Hypothesis.  (4 pts.)
2c.  Explain the Alternative Hypothesis.  (4 pts.)
2d.  Based on the test statistic, z, and the p-value, explain whether we should accept or reject the Null hypothesis.  (6 pts.)
2e.  Explain in your own words what the conclusion in 2d says about the result of the test and the action to be taken. (8 pts)